Abrading roller construction



1366- 1931. A. N. EMMONS ABRADING' RQLLER CONSTRUCTION Filed June 13, 1928 Patented Dec. 15, 1931 NITED STATE riser, Wm

ARTHUR n. EMMONS, or 'NEDBOW, nnwYoRK, AssIoNon To r'nn PonTiin-cABnnMA- CHINE COMPANY, or SYRACUSE, new YGRK, a conronarron OF-NEW YORK ABRADING' ROLLER ooivsrnuorror'r Application filed. June s, 1923. semi No. 284 384.

This invention relates to abrading Ina-- chines having a drum or roller around which is wrapped a sheet otabrading material as sand paper and the like, and has for its object a particularly simple and etficient means for drawing the sheet of abrading material around the drum and tighteningit equally around the drum throughout the length of the drum or the width of the sheet of abrading material. V

This invention consists in the novel features and in the combinations and constructions hereinafter set forth and claimed.

In describing this invention; reference is had to the accompanying drawings in which like characters designate corresponding parts in all the views.

Figure 1 is an elevation, partly broken away, of a drum provided with my'invention. I

Figure 2 is an end elevation thereof. Figure 3 is an elevation of one of the tightening rolls.

Figure l is anend elevation thereof. This abrading roller comprises, generally, a drum or body having alengthwise slot extending inwardly and opening through its periphery, a pair of tightening rolls mounted in the body on opposite sides of the slot, each 3 of these rolls having a lengthwise slightly spiral flattened portion and the flattened portions of. the two rolls. being arranged to come opposite each other inline with the slot the rolls being so mounted that the full portions project into the slot upon rotation of the rolls to tighten the sheet of abrasive material wrapped around the drum, this sheet having its end portions extending into the slot between the rolls and means for rotating the 40 rolls to tighten the abrading strip around the drum. I r

1 designates the drum which may be of any suitable form, size and construction, it being here shown as formed hollow with the heads 2 at each end in which is mounted a suitable the periphery ofthe drum.

his a sheet or" yielding material as felt usually wrapped around the body or-drum with its endsspaced apart 'to'form a slot 6 in line with the sloti. a v i f T designates the pair of tightening rolls mounted in the heads of the drum: on opposite sides of the slot 4;,jthe slot l extending" spirally relatively to the drum. Each. of the rolls 7 are formed-with a slightly spiral flattened portion extending from end to end there-0t, the rolls being movable so that their flattened portionscan be brought opposite each other in line with the slott. I The portion of eachroll on opposite sides ofthe flat-z 1 tenedportion 8 :is usually knurled with the exception of those portions mounted in bearings inthe' heads of the drum.

The rolls are provided with means'for turning them as wrench heads9, the wrenchheads 9 being tormedon one end of one rolland on the other end of the other roll.

Each roller is held from endwise movement by an interlockingengagement with one of its bearings, and as here shown each roll is formedwith an annular groove .lOloc'ated in one of its bearing'syand a key 11 in the-con tiguous head of the drum extends into the groove. 13.: 7

Inoperation, the sheet of abrading mate-I rial as sandpaper is cut off approximately: the right length. It is then wrapped around the drum and the end portions extended down into the slot 4. between the flattened turned so that the flattened portions are opposite each other. The rolls 7 are then turned 7 in opposite directions or toward each other by means of wrenches engaging opposite ends of v the rolls and by reason of the spiral fiat-- tened portions, the full portions of the rolls take hold of the abrading material instantly throughout the width ofthe sheet of material and draw or evenly tensionthe same through out the width of the sheet so that the sheet of material is evenly drawn taut on the drum.

What I claim is: i 1. An abrading roller comprising a drum having a lengthwise slot extending inwardly and opening through its periphery, a pair of rolls mounted in the drum on opposite sides of the slot, each roll having a spiral flattened portion, these flattened portions being arranged tocome opposite each other in line with the slot, the full portions of the pair of rolls projecting into the slot upon rotation of the rolls to move the flattened portions out of opposition to each other, a sheet of abrading material around the drum and having its ends extending into the slot between the rolls and means for rotating the rolls.

2. An abrading roller comprising a drum having a lengthwise slot extending inwardly and opening through the periphery of the drum, the slot being arranged slightly spiral, a pair of rolls mounted in the body on opposite sides of the slot and parallel thereto, each roll having a lengthwise slightly spiral flattened portion, the flattened portions being arranged to come opposite each other in line with the slot and the full portions of the rolls projecting into the slot upon rotation of the rolls so that their flattened portions are out of opposition to each other, and a strip of abradin g material extending around the drum With the ends thereof extending into the slot between the rolls, and means for rotating the rolls.

3. An abrading roller comprising a drum having a lengthwise slot extending inwardly and opening through the periphery of the drum, a pair of rolls mounted in the drum on opposite sides of the slot, the rolls having respectively lengthwise slightly spiralfiattened portions arranged to come opposite each other in line with the slot, the full portions of i the pairs of rolls projecting into the slot upon rotation of the rolls to move the flattened portions out of opposition to each other, a sheet of abrading material wrapped around the drum and having its ends extending into the I slot between the rolls, and means at one end of one roll and at the opposite end of the other roll for rotating the rolls.

In testimony whereof, I have hereunto signed my name, at Syracuse, in the county of Onondaga, and in the State of New York, this (3th day of June, 1928.

ARTHUR N. EMMON 

